Filter.



PATBNTED JULY'O, 1907.

G. H. GILMAN.

FILTER.

APPLIOATION FILED nov. 1, 190e.

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UNITED STATES PAENT OFFICE.

GEORGE H. GILMAN, OF BUFFALO, NEW YORK, ASSIGNOR TO GILMAN AUTOMATICFILTER COMPANY, OF BUFFALO, NEW YORK, A CORPORATION OF NEW YORK.

FILTER.

Specification of Letters Patent.

Patented July 30, 1907.

Application filed November 1, 1906. Serial No. 341,614.

To all 'whom it may concern:

Be it known that l, GEORGE H. GILMAN, a citizen of the United States,residing at Buffalo, in the county of Erie and State of New York, haveinvented a new and useful Improvement in Filters, of which the followingis a specification.

My invention relates to Iilters, and has for its object the productionof a filter which is thoroughly effective, automatic in operation andautomatically self'- cleaning.

Referring to the drawings herewith, Figure 1 is a vertical section. Fig.2 is a section on the line .a5-x, Fig. 1, looking to the right. Fig. 3is a detail of my inlet Valves. Fig. 4 is a detail of one of my outletvalves.

In the drawings I have shown my invention applied to a cabinet form ofiilter which may be placed, as shown, over a kitchen sink and secured tothe wall. This is a typical adaptation of my invention.

Two vertical chambers, 1 and 2, similar in construction contain thefilter-material, which, as shown, consists of charcoal at 3 and sand at4. I consider this the most effective combination, but it will beevident that I may substitute any other desired medium, such as porousstone or artificial stone such as the Pasteur clay. The bottoms of thechamber 1 and 2 are screenclosed by screens 5 preferably made of copper,and similar screens of copper 6, separate the charcoal and sand. Ipreferably employ copper for this purpose because nearly all impurewaters contain a small amount of chemicals which act upon the copper,producing certain copric compounds which destroy germs in the water.

Conduite 7 and 8 lead downwardly from the central, top portion of thefilter and lead to the chambers 1 and 2, respectively. The upper end ofthe conduit 7 connects with a fioat-chamber 9, in which a float 10operates; and the upper end of the conduit 8 connects with afloat-chamber 11, in which a oat 12 operates. The floats 10 and 12 arepivoted to rocker arms 13 and 14, which are pivoted in a bearing block15 which is secured to the partition 16 which separates the two chambers9 and 11. Integral with or connected to the arms 13 and 14 is a yoke 1.7which supports a square rod 18, and slidably mounted on this rod 18 is aball or weight 19. Buffers or cushions 20 are placed over the rod 18within the yoke 17 to receive the blows of the weight 19 as it movesfrom side to-side. It will now be evident that when one of the floats,say the float 10, is raised the yoke 17 will be rocked, and as soon asthe rod 18 passes sufiiciently past the horizontal position, the weight19 will slide to the other side of the yoke.

21 is the ordinary cold water supply pipe, supplying water underpressure` From this pipe a branch pipe 22 leads to a valve 23 and a pipe24 leads up to and connects with a hose 25. This hose passes filteredwater.

lthe conduit 7; and to this pin 27 is secured a wire 30 which connectswith a valve 3]. in the bottom of the conduit 8. The valves 29 and 31connect with an keduction pipe 32 which connects with the sink wastepipe33 above the trap. The wires 28 and 30 pass over proper guide rollers34, 35, 36, 37. It will now vbe seen that movement of the weight 19 willopen and close the valves 29 and 31 alternately.

38 is the iiltered water reservoir, which is closed except or the pipes39 and 40 which lead in from the chambers 1 and 2. The pipes 39 and 40are provided lwith valves 41 and 42 which prevent back flow from .thereservoir 38.

43 is the cock by which the filtered water may be drawn from thereservoir 38.

44 is a chamber which may be used for ice to cool the A drip-pipe 45connects this chamber with the eduction pipe 32.

By reference to Fig. 3 it will be seen that the valves 41 and 42comprise rubbers 46 which shut down over the ends of the pipes 39 and40, backed by weights 47 and light springs 48. This construction gives asimple and effective valve which responds readily to in-flow of waterand prevents out-flow.

By reference to Fig. 4 it will be seen that the valves 29 and 31comprise similar rubbers 49 which are secured to the base of theconduits 7 and 8 at the same little distance from the eduction pipes andwhich shut down over the eduction pipes. To these rubbers are secured,by eyebolts 50 cup-shaped weights 51.

A sufiicient amount of slack should be given the wires 28 and 30 (notshown in the drawings) so that when the yoke 17 shifts in response tothe lift of one of the floats the valve (29 or 31) then closed will notbe opened until the weight 19 slides over on the rod 18. Otherwise thealternation of operation, as hereafter described would be prevented.

Having now described the parts, I will next describe the operation.Assuming the ilter ready to be started with the parts in the positionshown in the drawings, water is admitted past the valve 23, flowsthrough the pipe 24 and tube 25 and falls into the chamber 9. From thisit passes down into the conduit 7, up through the filter-material 4 and3, through the pipe 39, past the valve 41 and into the reservoir 38.This continues until the reservoir 38 is filled. The fit ofthe valves 41and 42, while sufficient to prevent back-flow of water,

is not su'fliciently close to prevent escape oi air as clisplaced by theinflow oi water. When the reservoir 38 is filled the level of the waterwill rise in the chambers 1 and 9 until the i'loat 10 is liftedsufficiently high to cause the weight 19 to slide to the other side ofthe yoke 17. This will cause the yoke 17 to swing to the oppositeextreme limit and carry the hose over the chamber 11, cause the wire 28to open the valve 29 and allow the-valve 31 to close by gravity, Thewatercontained by the chamber 9 and the conduit 7 will then flow outthrough the pipe 32 and the head ol water in the chamber 1, which isiiltered water, will flow down through the ilter-material and out thesame passage, washing out and cleansing the filter-material thoroughlyand well. Thus the iilter oi chamber 1 is cleaned. Water new flowsthrough the hose 25, into chamber 2, down through conduit 8, up throughthe iilter-material in chamber 2, and it any water has been used out olthe reservoir 38, rellls it through the pipe 40. reservoir isagainlilled the level of water rises in chambers 11 and 2, until the lioat 12causes the weight 19 to slide back on the rod 18, carryin g the hose 25over chamber 9, opening the valve 31 and closing the valve 29, The headof filtered water in chamber 2 will then wash the filter-material ofthat chamber. lt will then be seen that the filter is automatic inoperation; that the reservoir is always kept iilled; that the ['iltersautomatically cleansed and washed with filtered water; and that therapidity of operation may be regulated by the valve 23 which regulatesthe supply oi water.

l Having thus described my invention7 I claim:

1. ln combination with a iilter chamber, inter-material thereincontained and a reservoir, automatic means for forcing water upwardlythrough the iilter material to iill said reservoir and to supply a headof iiltered water above the inter-material, means for automaticallycutting oit When the j the water supply when said reservoir is filledand said head is established and for automatically causing said head ofliltered Water to flow back through said filter-material to washthesame. Y

2. A iilter comprising two filter chambers, filter-material in each, areservoir, a source of water supply, automatic means for directing saidwater supply alternately through saidv iilter chambers to lill. saidchamber a'nd to supply a head of filtered water above the lteumaterial,and automatic means l'or permitting 'the head o' filtered Water t0 flowback through the iilter-material to wash the same when said water supplyis directed to the other iilter chamber.

3. A lilter comprising two filter chambers, filter-material in each, areservoir, a source of water supply, conduits leading said water supplyinto the bottom of said 'filter chambers, pipes supplied withcheck-valves leadingA from said iilter chambers into said reservoir,lioat-valve chambers situated over said conduits, floats therein,shifting mechanism actuated by said floats which directs said watersupply alternately from one oat chamber to the other and valves in thebottoms of said conduits actuated by said shifting mechanism.

4. A Iilter comprising two filter chambers, filter-material in each andopen areas above the iiltermaterial, a reservoir, a source of constantwater supply and means for regulating, the volume thereof, conduitsleading saidwater supply into the bottoms of said lter chambers, pipesleadingl from said filter-chambers' into said reservoir, check valves insaid pipes to prevent back-How ot water from said reservoir butpermitting escape of air therefrom, iloat valve chambers situated oversaid conduits and onk a level with the upper open areas ol said lilterchambers, floats in said iloat chambers, shitting.;l mechanism actuatedbyA GEORGE H. GILMAN.

Witnesses z Gnoaen W. SHEPARD, MYRON I?. Busi-r.

